FR2443682B1 - - Google Patents
Info
- Publication number
- FR2443682B1 FR2443682B1 FR7834478A FR7834478A FR2443682B1 FR 2443682 B1 FR2443682 B1 FR 2443682B1 FR 7834478 A FR7834478 A FR 7834478A FR 7834478 A FR7834478 A FR 7834478A FR 2443682 B1 FR2443682 B1 FR 2443682B1
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9046—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents by analysing electrical signals
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7834478A FR2443682A1 (en) | 1978-12-07 | 1978-12-07 | CIRCUIT FOR AUTOMATIC CORRECTION OF A SIGNAL TRANSMITTED BY AN IMBALANCE DIFFERENTIAL SENSOR |
DE7979400959T DE2966034D1 (en) | 1978-12-07 | 1979-12-04 | Automatic correction circuit for an electrical signal emitted by a differential transducer out of balance |
US06/100,128 US4326166A (en) | 1978-12-07 | 1979-12-04 | Correcting circuit for differential pick-up, comprising digital means |
EP79400959A EP0012665B1 (en) | 1978-12-07 | 1979-12-04 | Automatic correction circuit for an electrical signal emitted by a differential transducer out of balance |
JP15820879A JPS5580060A (en) | 1978-12-07 | 1979-12-07 | Signal correction circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7834478A FR2443682A1 (en) | 1978-12-07 | 1978-12-07 | CIRCUIT FOR AUTOMATIC CORRECTION OF A SIGNAL TRANSMITTED BY AN IMBALANCE DIFFERENTIAL SENSOR |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2443682A1 FR2443682A1 (en) | 1980-07-04 |
FR2443682B1 true FR2443682B1 (en) | 1982-03-26 |
Family
ID=9215794
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7834478A Granted FR2443682A1 (en) | 1978-12-07 | 1978-12-07 | CIRCUIT FOR AUTOMATIC CORRECTION OF A SIGNAL TRANSMITTED BY AN IMBALANCE DIFFERENTIAL SENSOR |
Country Status (5)
Country | Link |
---|---|
US (1) | US4326166A (en) |
EP (1) | EP0012665B1 (en) |
JP (1) | JPS5580060A (en) |
DE (1) | DE2966034D1 (en) |
FR (1) | FR2443682A1 (en) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4303885A (en) * | 1979-06-18 | 1981-12-01 | Electric Power Research Institute, Inc. | Digitally controlled multifrequency eddy current test apparatus and method |
WO1981003381A1 (en) * | 1980-05-22 | 1981-11-26 | Secr Defence Brit | Improvements in or relating to measurement apparatus |
ATE23756T1 (en) * | 1981-02-09 | 1986-12-15 | Goring Kerr Ltd | METAL DETECTOR. |
FR2502337A1 (en) * | 1981-03-23 | 1982-09-24 | Commissariat Energie Atomique | METHOD OF NON-DESTRUCTIVE CONTROL BY CURRENT FOUCAULT WITH BUOYOR CORRECTION AND DEVICE FOR IMPLEMENTING THE SAME |
US4499422A (en) * | 1981-06-08 | 1985-02-12 | Schlumberger Technology Corporation | Digital induction logging tool including means for compensating for phase shift errors |
DE3125732A1 (en) * | 1981-06-30 | 1983-01-13 | Nukem Gmbh, 6450 Hanau | METHOD AND DEVICE FOR TESTING MATERIALS ACCORDING TO THE FLUID FLOW PRINCIPLE |
BE892243A (en) * | 1982-02-23 | 1982-06-16 | Dev Et D Industrialisation Des | EDGE CURRENT MONITORING APPARATUS WITH ELECTRONIC BALANCING MEANS. |
US4641092A (en) * | 1982-07-08 | 1987-02-03 | Sumitomo Metal Industries, Ltd. | Rotary probe apparatus for detecting flaws in a test object |
US4709213A (en) * | 1982-07-23 | 1987-11-24 | Garrett Electronics, Inc. | Metal detector having digital signal processing |
DE3313820A1 (en) * | 1983-04-16 | 1984-10-18 | Institut Dr. Friedrich Förster Prüfgerätebau GmbH & Co KG, 7410 Reutlingen | DEVICE FOR TESTING THE SURFACE OF A METAL TEST PART |
SE457117B (en) * | 1984-02-17 | 1988-11-28 | Bengt Hjalmar Toernblom | SET AND DEVICE FOR TESTING ELECTRICALLY CONDUCTIVE SAMPLES |
US4629985A (en) * | 1984-04-11 | 1986-12-16 | Pa Incorporated | Method and apparatus for measuring defects in tubular members |
US4651094A (en) * | 1984-07-16 | 1987-03-17 | John Wallace | Accuracy control subsystem |
US4652822A (en) * | 1984-07-16 | 1987-03-24 | John Wallace | Multi-frequency eddy-current system and method |
US4823082A (en) * | 1986-02-18 | 1989-04-18 | Kabushiki Kaisha Kobe Seiko Sho | Signal processing method for an electromagnetic induction test |
US4785242A (en) * | 1986-12-15 | 1988-11-15 | Sundstrand Corporation | Position detecting apparatus using multiple magnetic sensors for determining relative and absolute angular position |
US4746859A (en) * | 1986-12-22 | 1988-05-24 | Sundstrand Corporation | Power and temperature independent magnetic position sensor for a rotor |
US4847552A (en) * | 1987-07-07 | 1989-07-11 | The Boeing Company | Detection of electrically conductive materials beneath surface coatings employing eddy currents |
GB8719396D0 (en) * | 1987-08-17 | 1987-09-23 | Picker Int Ltd | Eddy current compensation |
FR2627862A1 (en) * | 1988-02-26 | 1989-09-01 | Commissariat Energie Atomique | IMPULSIVE FOUCAULT CURRENT MONITORING METHOD AND DEVICE FOR IMPLEMENTING THE SAME |
GB2255184B (en) * | 1991-04-22 | 1995-08-16 | Tokyo Gas Co Ltd | Flaw detector for metal material |
WO1993009428A1 (en) * | 1991-10-29 | 1993-05-13 | Siemens Aktiengesellschaft | Circuit assembly and method for electrical eddy-current testing |
US6346807B1 (en) * | 1999-10-22 | 2002-02-12 | Bently Nevada Corporation | Digital eddy current proximity system: apparatus and method |
KR100505929B1 (en) * | 2003-03-31 | 2005-08-04 | 삼성광주전자 주식회사 | A compressor and A method for connecting pipeline of compressor |
JP4906484B2 (en) * | 2006-11-29 | 2012-03-28 | 株式会社三谷バルブ | Ejector |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3229198A (en) * | 1962-09-28 | 1966-01-11 | Hugo L Libby | Eddy current nondestructive testing device for measuring multiple parameter variables of a metal sample |
US3566258A (en) * | 1967-03-23 | 1971-02-23 | Nippon Kokan Kk | Eddy current flaw detector having automatically balancing bridge circuit |
US3916301A (en) * | 1974-05-20 | 1975-10-28 | Republic Steel Corp | Magnetic flaw detection apparatus |
US4006407A (en) * | 1975-03-10 | 1977-02-01 | Magnaflux Corporation | Non-destructive testing systems having automatic balance and sample and hold operational modes |
FR2324003A1 (en) * | 1975-09-09 | 1977-04-08 | Commissariat Energie Atomique | NON DESTRUCTIVE EDD CURRENT CONTROL PROCESS AND CORRESPONDING DEVICE, USING MULTI-FREQUENCY EXCITATION AND ALLOWING THE ELIMINATION OF CERTAIN PARAMETERS |
JPS52142955A (en) * | 1976-05-24 | 1977-11-29 | Sumitomo Metal Ind | Method of controlling pulse signal level balance |
-
1978
- 1978-12-07 FR FR7834478A patent/FR2443682A1/en active Granted
-
1979
- 1979-12-04 EP EP79400959A patent/EP0012665B1/en not_active Expired
- 1979-12-04 DE DE7979400959T patent/DE2966034D1/en not_active Expired
- 1979-12-04 US US06/100,128 patent/US4326166A/en not_active Expired - Lifetime
- 1979-12-07 JP JP15820879A patent/JPS5580060A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
US4326166A (en) | 1982-04-20 |
JPS5580060A (en) | 1980-06-16 |
DE2966034D1 (en) | 1983-09-08 |
EP0012665B1 (en) | 1983-08-03 |
EP0012665A1 (en) | 1980-06-25 |
FR2443682A1 (en) | 1980-07-04 |
JPH0325749B2 (en) | 1991-04-08 |